Automatic window-lock



A. ZENTARSKE.

AUTOMATIC WINDOW LOCK.

APPLICATION FILED JAN.31, I919.

1 33 2, 3 l 5 Patented Mar. 2, 1920.

2. Suva n fol Amfzoi Zemars/r ANTHONY 'znnransnn, or Jomnr, ILLINOIS.

Annemarie WINDUW-LOCK.

Specification of Letters mam.

ratenteu Maine, 19120.

Application filed January '31, 1919. Serial No. 274,197.

To all whom it may concern:

Be it known that I, ANTHONY ZnN'rAnsKn, a citizen of the United States, residing at J oliet in the county of Will and State of Illinois, have invented certain new and useful Improvements in Automatic Window- Locks, of which the following is a specification.

This invention relates to windowsash locks and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide a lock of the character stated which is of simple and durable structure and which when in locked position or condition will effectually hold the upper and lower sashes from moving vertically in the window frame and which also hold the sashes to prevent them from rattling in the window frame.

With these objects in view the lock comprises a plate adapted to be attached to the bottom rail of the upper sash and having a handle pivotally mounted thereon. A lever is also pivotally mounted on said plate and is provided with angularly disposed end portions. A second plate or member is adapted to be applied to the top rail of the lower sash and is provided with a cam upper surface upon which the free end portion of the handle is adapted to move and a cam edge portion behind which the free end portion of the handle is adapted to engage to draw the sashes together. Said member is also provided with a lug adapted to engage one end of the lever and swing the same when the lower sash is moved to a lowered position and said lever in turn engages the handle and automatically swings the same over the member whereby the sashes are locked together and against relative movement.

In the accompanying drawing Figure 1 is a top plan view of the sash lock.

Fig. 2 is a side elevation of the same.

The sash lock comprises a triangular base plate 1 adapted to be applied to the lower rail of the upper sash as shown in Fig. l. A handle 2 is pivotally mounted on a pivot a, shown in dotted lines in Fig. 1, of the plate 1 for horizontal swinging movement. Said handle is provided at its free end with a downwardly disposed lip 3. A rock lever 4 is pivotally mounted on the pin 0, held to the lug b, which is located near the outer edge of the plate 1 for vertical swinging movement. The lever 4: is provided'at one end with an upwardly disposed stop ear 6 with which the edge of the handle 2 has contact. Said lever is provided at its opposite or other end with an upwardly disposed striker end '6 with which a lug ihas contact- I The sash look also includes abase plate 7 adapted to be applied to the top rail of the lower sash. The base plate 7 is provided with an upstanding shoulder forming portion 8 having a cam upper surface 9 and pro vided at one end and at the upper portion of said cam surface with a laterally disposed lug 10. Said lug is adapted to strike the end 6 of the lever 4: and swing the same. The portion 8 is also provided with a cam edge 11 which is located at the end opposite the lug 10 and at the opposite side of the lug.

The operation of the sash lock is as follows. Assuming that the parts are in the position as shown in the drawing, wherein it will be seen that the lower sash is about to be moved to its lowered position with relation to the upper sash. As the lower sash descends the lug l0 strikes the portion 6 of the lever A and carries the member 5 upward to swing the lever 2 over the cam shoulder 8.

Thus the free end portion of the handle 2 moves up over the cam surface 9 of the portion 8 and the sashes are locked against vertical movement with relation to each other. At the same time the lip 3 moves along and in engagement with the cam edge 11 of the portion 8 whereby the adjacent edges of the sashes are drawn together and they are held against rattling.

WVhen it is desired to move one sash in the window frame with relation to the other, the handle is swung from the dotted line position as shown in Fig. 1 and consequently the free end of the handle is moved out of the path of movement of the top rail of the lower sash and either or both sashes may be moved in the window frame in a usual manner.

From the foregoing description taken in conjunction with the accompanying drawing it will be seen that a sash lock of simple and durable structure is provided and that the same may be automatically operated by the movement of the lower sash to lock the sashes against vertical relative movement in the window frame and also to draw the sashes together and prevent them from rattling in the window frame.

Having described the invention what is claimed 1s 1. In a lock of the character described, the combination with a base plate, a handle pivotally mounted on said base for horizontal swinging movement, said handle ending at its free end in a downwardly directed lip, a rock lever pivotally mounted on said plate near the outer edge having an upwardly disposed stop ear at one end and an upwardly g disposed striker termination at the other end, and a member having an upstanding shoulder having an upper cam surface and provided at one end at the upper portion of said cam surface with a laterally disposed lug adapted to contact with the striker end of said lever, all arranged as set forth.

2. A sash lock comprising a plate, a handle pivoted thereon, a lever pivoted thereon and having angularly disposed end portions one of which is engaged by the handle, said handle having at its free end an angularly disposed lip, a member having a portion provided with a cam edge face adapted to be engaged by the lip upon the handle and having a lug adapted to engage the other angularly disposed portion of the lever.

In testimony whereof I afliX my signature.

ANTHONY ZENTARSKE. 

